AG04T0S110017Amendment1Spec323113.pdf

USDA Forest Service Project Specifications

May, 2011 Marys Peak Grounding and Lightning Protection 32 31 13 – Page 1/9

Amendment to Section 32 31 13:

Part 2, 2.01(A)(1)

Part 2, 2.01(A)(3)(b)(i)

Part 2, 2.02(A)(2)(a) and (b) Note: The updated specifications override the post diameters noted in the drawings.

Part 2, 2.03(A)(2)

Part 3, 3.04(F)(1)

Part 3, 3.04(H) Removed

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SECTION 32 31 13

1. PART 1 - GENERAL

CHAIN LINK FENCES AND GATES

1.01 SUMMARY

A. Section includes polyvinyl chloride (PVC) coated chain link fence fabric and gates with

PVC color coated galvanized steel framework and accessories for commercial or industrial applications.

B. Contractor shall submit bids for both a standard galvanized steel fence and gate system and for a PVC color coated galvanized steel fence and gate system. The Government will then decide which option is the best value to the Government.

1.02 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions Specification Sections, apply to this Section.

1.03 PERFORMANCE REQUIREMENTS

A. Delegated Design to Contractor: Design chain-link fences and gates to the criteria specified under this specification, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated.

B. Structural Performance: Chain-link fence and gate framework shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated according to ASCE/SEI 7

1. Minimum Post Size: Determine according to ASTM F 1043 for framework up to 12 feet (3.66 m) high, and post spacing not to exceed 8 feet based on mesh size and pattern specified and on the following:

a. Wind Loads: 100 mph.

b. Exposure Category: D.

c. Fence Height: 7 feet

d. Material Group: IA, ASTM F 1043, Schedule 40 steel pipe.

C. Lightning Protection System: Maximum grounding-resistance value of 25 ohms under normal dry conditions.

1.04 ACTION SUBMITTALS

A. Product Data: For each type of product indicated.

1. Fence and gate posts, top caps, rails, and fittings.

2. Chain-link fabric, reinforcements, and attachments.

3. Accessories: Barbed wire.

4. Gates and hardware.

B. Refer to Grounding and Lightning Protection drawing E-04 for fence details.

C. Shop Drawings: Include plans, elevations, sections, details, and attachments to other work. Show accessories, hardware, gate operation, and operational clearances.

D. Samples for Initial Selection: For components with factory-applied color finishes.

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E. Delegated-Design Submittal: For chain-link fences and gate framework indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

1.05 INFORMATIONAL SUBMITTALS

A. Qualification Data: For qualified factory-authorized service representative.

B. Product Certificates: For each type of chain-link fence and gate from manufacturer.

C. Product Test Reports: For framing strength according to ASTM F 1043.

D. Field quality-control reports.

E. Warranty: Sample of special warranty.

1.06 PROJECT CONDITIONS

A. Field Measurements: Verify layout information for chain-link fences and gates shown on Drawings in relation to property survey and existing structures. Verify dimensions by field measurements.

1.07 QUALITY CONTROL

A. Manufacturer: Company having manufacturing facilities in the United States with a minimum 5 years experience specializing in manufacturing of chain link fence products.

Approved manufacturer: Master Halco, Inc. (800) 229-5615; www.masterhalco.com, or approved equivalent manufacturer.

B. Fence Contractor: Contractor having a minimum 5 years experience installing similar projects in accordance with ASTM F567.

C. Tolerances: ASTM current specification and tolerances shall apply.

D. All steel fence materials including fasteners shall be factory hot-dipped galvanized, unless otherwise specified.

E. No field welding or fabrication is allowed for fencing.

F. All materials shall be new and rust free upon delivery and installation.

G. To ensure system integrity and compatibility, the Contractor shall obtain the chain link system, framework, fabric, fittings, gates, and accessories from one manufacturer.

1.08 WARRANTY

A. Special Warranty: Manufacturer's standard form in which Installer agrees to repair or replace components of chain-link fences and gates that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Deterioration of metals, metal finishes, and other materials beyond normal weathering.

2. Warranty Period: Five years from date of Substantial Completion.

2. PART 2 - PRODUCTS

2.01 CHAIN-LINK FENCE FABRIC

A. General: Provide fabric in one-piece heights measured between top and bottom of outer edge of selvage knuckle or twist. Comply with CLFMI Chain Link Fence Manufacturer’s Instructions Product Manual and with requirements indicated below:

1. Fence Fabric Height: 6 feet.

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2. Wire diameter and mesh sizes in first two subparagraphs below are commonly available and are limited to certain heights depending on the usage of the fence. See ASTM standards and CLFMI Product Manual.

3. Steel Wire Fabric: 9-gauge core wire

a. Mesh Size: 2 inches (50 mm)

b. Polymer-Coated Fabric: ASTM F 668, Class 1 over zinc-coated steel wire.

i. Color: Brown, as offered by the manufacturer's standard range, complying with ASTM F 934.

c. Coat selvage ends of fabric that is metallic coated before the weaving process with manufacturer's standard clear protective coating.

d. Fence fabric shall have top selvages knuckled and bottom selvages twisted and barbed.

2.02 FENCE FRAMING

A. Posts and Rails: Comply with ASTM F 1043 for framing, including rails, braces, and line; terminal; and corner posts. Provide members with minimum dimensions and wall thickness according to ASTM F 1043 based on the following:

1. Fence Height: 7 feet.

2. Light Industrial Strength: Material Group IC-L, round steel pipe, electric-resistance-welded pipe

a. Line Post: 2.875 inches (73 mm) in diameter

b. End, Corner and Pull Post: 4.0 inches (102 mm)

3. Horizontal Framework Members: top, intermediate and bottom rails complying with

ASTM F 1043.

a. Top Rail: 1.66 inches (42 mm) in diameter

4. Polymer coating over metallic coating.

a. Color: Match chain-link fabric complying with ASTM F 934.

2.03 SWING GATES

A. General: Comply with ASTM F 900 for gate posts and double swing gate types.

1. Gate Leaf Width: 72 inches

2. Gate Fabric Height: 6 feet.

3. Provide galvanized drop rod with center gate stop pipe or receiver to secure inactive leaf in the closed position.

4. Provide galvanized pressed steel locking latch, requiring one padlock for locking both gate leaves, accessible from either side.

5. Fabric for gates shall match fence fabric.

6. Each gate shall be diagonally cross-braced with a 3/8-inch diameter adjustable length truss rod to ensure frame rigidity without sag or twist.

7. Barbed wire is required on each gate.

8. Gates shall swing as shown on drawing Sheet E-02.

B. Hinges

1. Hot dip galvanized pressed steel or malleable iron, structurally capable of supporting gate leaf and allow opening and closing without binding.

2. Non-lift-off type hinge design shall permit gate to swing 180 degrees.

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C. Latch

1. Galvanized forked type capable of retaining gate in closed position and have provision for padlock.

2. Latch shall permit operation from either side of gate.

D. Pipe and Tubing

1. Zinc-Coated Steel: Comply with ASTM F 1043 and ASTM F 1083; protective coating and finish to match fence framing

2. Gate Posts: Round tubular steel

3. Gate Frames and Bracing: Round tubular steel

E. Frame Corner Construction: assembled with corner fittings.

F. Extended Gate Posts and Frame Members: Extend gate posts and frame end members above top of chain-link fabric at both ends of gate frame 12 inches (300 mm) to attach barbed wire assemblies.

G. Hardware:

1. Hinges: 180-degree swing.

2. Latches permitting operation from both sides of gate with provision for padlocking accessible from both sides of gate.

3. Padlock and Chain: Owner furnished.

4. Closer: Manufacturer's standard

2.04 FITTINGS

A. General: Comply with ASTM F 626.

B. Post Caps

1. ASTM F626 galvanized pressed steel, malleable iron, or aluminum alloy weather tight closure cap for tubular posts.

2. Provide one cap for each post.

3. Provide line post caps with loop to receive tension wire or top rail.

C. Rail and Brace Ends: For each gate, corner, pull, and end post.

D. Rail Fittings: Provide the following:

1. Top Rail Sleeves: Pressed-steel or round-steel tubing not less than 6 inches (152 mm) long.

2. Rail Clamps: Line and corner boulevard clamps for connecting intermediate and bottom rails in the fence line-to-line posts.

E. Tension and Brace Bands: Pressed steel F. Tension Bars: Steel length not less than 2 inches (50 mm) shorter than full height of chain-link fabric. Provide one bar for each gate and end post, and two for each corner and pull post, unless fabric is integrally woven into post.

G. According to CLFMI, truss rod may be eliminated from compression brace in any line of steel fence with round or C-section line post that has a continuous center rail. Diagonal truss rod assemblies are positioned at a 45- to 50-degree angle running from brace rail, usually at midpoint of line post to bottom of terminal post.

H. Truss Rod Assemblies: Steel, hot-dip galvanized after threading rod and turnbuckle or other means of adjustment.

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I. Coordinate option for accommodating top rail or tension wire with option retained for post caps. If more than one arrangement of components is required, indicate on Drawings.

J. Barbed Wire Arms: Pressed steel or cast iron with clips, slots, or other means for attaching strands of barbed wire, and means for attaching to posts; for each post unless otherwise indicated, and as follows:

1. Provide line posts with arms that accommodate top rail or tension wire.

2. Provide corner arms at fence corner posts, unless extended posts are indicated.

3. Type I, single slanted arm.

K. Tie Wires, Clips, and Fasteners

1. 9 gauge galvanized steel wire for attachment of fabric to line posts and rails.

2. Pre-formed hog rings to be 9 gauge galvanized steel or aluminum for attachment of fabric to tension wire.

3. Tie wire and hog rings PVC coated and in compliance with ASTM F626; color to match fabric color.

L. Finish:

1. Metallic Coating for Pressed Steel or Cast Iron: Not less than 1.2 oz. /sq. ft. (366 g /sq. m) zinc.

2. Polymer coating over metallic coating.

3. All fittings to be thermally fused color coated having a minimum thickness of 0.006”

(0.152 mm) per ASTM F626.

4. PVC color to match fabric and framework.

5. Moveable parts, nuts, and bolts shall be field coated with PVC liquid touch up after installation

2.05 BARBED WIRE

A. Polymer-Coated, Galvanized-Steel Barbed Wire: Comply with ASTM F 1665 two-strand barbed wire, 0.080-inch- (2.03-mm-) diameter line wire with 0.080-inch- (2.03-mm-) diameter, four-point round aluminum alloy barbs spaced not more than 5 inches (127 mm) o.c.:

1. Polymer Coating: Class 2a or as selected by CO from manufacturer's standard range over zinc-coated steel wire.

a. Color: Match chain-link fabric, complying with ASTM F 934.

2.06 TENSION WIRE

A. PVC coated metallic coated steel tension wire per ASTM F 1664.

B. 9 gauge steel core wire.

C. PVC coating class and color to match chain link fabric.

2.07 CONCRETE:

A. Provide concrete consisting of portland cement, ASTM c 150, aggregates ASTM c 33, and clean water.

B. Mix materials to obtain concrete with a minimum 28-day compressive strength of 3000 psi.

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C. Use at least 4 sacks of cement per cu. Yd., 1-inch maximum size aggregate, maximum 4-inch slump, and 3 to 5 percent entrained air.

2.08 GROUT AND ANCHORING CEMENT

A. Non-shrink, Nonmetallic Grout: Premixed, factory-packaged, non-staining, noncorrosive, nongaseous grout complying with ASTM C 1107. Provide grout, recommended in writing by manufacturer, for exterior applications.

B. Erosion-Resistant Anchoring Cement: Factory-packaged, non-shrink, non-staining, hydraulic-controlled expansion cement formulation for mixing with potable water at Project site to create pourable anchoring, patching, and grouting compound. Provide formulation that is resistant to erosion from water exposure without needing protection by a sealer or waterproof coating and that is recommended in writing by manufacturer, for exterior applications.

3. PART 3 - EXECUTION

3.01 EXAMINATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for earthwork, and other conditions affecting performance of the Work.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.02 PREPARATION

A. Stake locations of fence lines, gates, and terminal posts. Do not exceed intervals of 100 feet (152.5 m) or line of sight between stakes. Indicate locations of utilities, underground structures, benchmarks, and property monuments.

3.03 INSTALLATION, GENERAL

A. Provide approximately 500 feet of fence with three-strand barbed wire on top on an angled swing arm. Provide two 12-foot vehicular gates. Provide 8 corner/pull posts and approximately 56 line posts with three-foot deep footings. Contractor to verify quantities, and provide the quantities needed.

B. Install chain-link fencing to comply with ASTM F 567, manufacturer’s recommendations, and more stringent requirements as indicated.

C. Install grounding system as specified in Section 16675.

3.04 CHAIN-LINK FENCE INSTALLATION

A. Post Excavation: Drill or hand-excavate holes for posts to diameters and spacings indicated, in firm, undisturbed soil.

B. Post Setting: Set posts in concrete at indicated spacing into firm, undisturbed soil.

1. Verify that posts are set plumb, aligned, and at correct height and spacing, and hold in position during setting with concrete or mechanical devices.

2. Concrete Fill: Place concrete around posts to dimensions indicated and vibrate or tamp for consolidation. Protect aboveground portion of posts from concrete splatter.

a. Exposed Concrete: Extend 2 inches (50 mm) above grade; shape and smooth to shed water.

C. Terminal Posts: Locate terminal end, corner, and gate posts per ASTM F 567 and terminal pull posts at changes in horizontal or vertical alignment of 15 degrees or more.

D. Line Posts: Space line posts uniformly at 8 feet o.c.

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E. Post Bracing and Intermediate Rails: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Diagonally brace terminal posts to adjacent line posts with truss rods and turnbuckles. Install braces at end and gate posts and at both sides of corner and pull posts.

1. Locate horizontal braces at mid-height of fabric 72 inches (1830 mm) or higher, on fences with top rail and at two-third fabric height on fences without top rail. Install so posts are plumb when diagonal rod is under proper tension.

F. Tension Wire: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Pull wire taut, without sags. Fasten fabric to tension wire with 0.120-inch- (3.05-mm-) diameter hog rings of same material and finish as fabric wire, spaced a maximum of 24 inches (610 mm) o.c. Install tension wire in locations indicated before stretching fabric. Provide horizontal tension wire at the following locations:

1. Extended along bottom of fence fabric. Install bottom tension wire within 6 inches (152 mm) of bottom of fabric and tie to each post with not less than same diameter and type of wire.

G. Top Rail: Install according to ASTM F 567, maintaining plumb position and alignment of fencing. Run rail continuously through line post caps, bending to radius for curved runs and terminating into rail end attached to posts or post caps fabricated to receive rail at terminal posts. Provide expansion couplings as recommended in writing by fencing manufacturer.

H. Intermediate and Bottom Rails: Install and secure to posts with fittings.

I. Chain-Link Fabric: Apply fabric to outside of enclosing framework. Leave 1 inch (25.4

mm) between finish grade or surface and bottom selvage. Pull fabric taut and tie to posts, rails, and tension wires. Anchor to framework so fabric remains under tension after pulling force is released.

J. Tension or Stretcher Bars: Thread through fabric and secure to end, corner, pull, and gate posts with tension bands spaced not more than 15 inches (380 mm) o.c.

K. Tie Wires: Use wire of proper length to firmly secure fabric to line posts and rails.

Attach wire at one end to chain-link fabric, wrap wire around post a minimum of 180 degrees, and attach other end to chain-link fabric per ASTM F 626. Bend ends of wire to minimize hazard to individuals and clothing.

1. Maximum Spacing: Tie fabric to line posts at 12 inches (300 mm) o.c. and to braces at 24 inches (610 mm) o.c.

L. Fasteners: Install nuts for tension bands and carriage bolts on the side of the fence opposite the fabric side. Peen ends of bolts or score threads to prevent removal of nuts.

M. Barbed Wire: Install barbed wire uniformly spaced angled toward security side of fence.

Pull wire taut, install securely to extension arms, and secure to end post or terminal arms.

3.05 GATE INSTALLATION

A. Install gates according to manufacturer's written instructions, level, plumb, and secure for full opening without interference.

B. Install a pipe encased in a minimum 12” diameter by 12” deep concrete base in the center of the opening to support the drop bar on the gate.

C. Install gates so that one half opens independently to allow for pedestrian access, while the other half remains secure from movement with the drop bar anchored in the base.

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D. Install two stop posts per gate (four total), secured with concrete, to prevent the gates from contacting the adjacent fencing. Also install galvanized gate hold back keepers consisting of a mechanical device for securing free end of the gate in this open position.

E. Attach fabric as for fencing.

F. Attach hardware using tamper-resistant or concealed means.

G. Install ground-set items in concrete for anchorage.

H. Adjust hardware for smooth operation and lubricate where necessary.

3.06 ADJUSTING

A. Gates: Adjust gates to operate smoothly, easily, and quietly, free of binding, warp, excessive deflection, distortion, nonalignment, misplacement, disruption, or malfunction, throughout entire operational range. Confirm that latches and locks engage accurately and securely without forcing or binding.

3.07 OPERATION

A. Provide detailed operation and maintenance information to instruct Forest Service on adjusting, operating, and maintaining the new fence and gates.

4. PART 4 – MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT

A. Measurement for the work of this section shall be measured and paid for on a lump sum all required basis, including full compensation for all labor, materials, equipment, adjusting, and incidentals necessary to complete the work as shown on the drawings and specified herein.

B. Note the separate pay items for both a standard galvanized steel fence and gate system and for a PVC color coated galvanized steel fence and gate system. The Contractor shall submit bids for both. The Government will then decide which option is the best value to the Government and award the Contract accordingly.

4.02 PAYMENT

A. Payment shall include all costs necessary to provide and install the fence and gates as described in this section.

B. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

323113 - 1 Galvanized Fence and Gates Lump Sum 323113 - 2 PVC-Coated Fence and Gates Lump Sum

END OF SECTION 323113

C. Lightning Protection System: Maximum grounding-resistance value of 25 ohms under normal dry conditions.

2. Warranty Period: Five years from date of Substantial Completion.